氧在表面存在三种吸附态，其中原子态吸附氧是乙烯环氧化和深度氧化的活性物种，分子态氧对两个反应不起直接作用。
The adsorbed atomic oxygen is the common oxygen species for both ethylene epoxidation and combustion; molecular oxygen plays no direct role in either two reactions.
用改进的PPP-CI方法计算染料分子的跃迁能和电荷密度，结果表明，茚苯胺染料的光退色速率与染料分子中某些原子上的电荷密度有关，单重态氧可能在光退色过程中起着重要作用。
The transition energies and charge densities of dye molecules are calculated by modify PPP-CI method. The results show that the photofading rates are closely related to the charge densities ons…
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